Hydrophobic glass and paper coatings based on plasma polymerized vegetable oils using a novel atmospheric pressure plasma concept

Abstract

Atmospheric pressure plasma polymerization represents a promising coating technology, addressing drawbacks of traditional processes (solvent use, multistep procedures, etc.) while enabling deposition of thin cross‐linked polymer layers with high contour fidelity. We address technological challenges with a novel plasma device that integrates multiple plasma source benefits and investigate the suitability of two plant‐based precursors, chia and tung oil, for plasma polymerization to hydrophobize glass and paper. Chia oil enables the deposition of thin, covalently bonded hydrophobic polymer layers. Such coatings have diverse applications especially inside the paper industry, where water repellents in the form of internal and surface sizing have always been an essential functionalization step. Using bio‐based precursors and reducing extra chemicals contributes to substituting fossil‐based or harmful substances.

Enhancing Hydrophobic Properties in Olive Oil-Coated Papers through Thermal Treatment

“…Transesterification can also be performed under supercritical solvent conditions, e.g., using sunflower oil [8]. Further approaches include grafting processes such as ring-opening polymerization [9], crosslinking processes [10][11][12], plasma polymerization [13] or application as part of hybrid organic nanoparticles [14] using a large variety of oils such as derivatives of soybean, castor, chia oil and olive oil. A simple process of immersing cotton substrates in organic solutions of soybean oil and subsequent heating to 120 • C for 1 h followed by acetone rinsing imparted water contact angles (WCAs) of up to 80 • , while fully hydrophobic properties could not be achieved despite the use of a rather rough substrate [15].…”